Have a look at attachment,there is a 2950 24 port switch , which is connected to 8274 ibm core switch via ethernet.The 2950 has two fibre modules connected to 4507 switch with hsrp and etherchannel configured.
The 2950 switch ethernet link connected to 8274 ibm core switch is
fluctuating. at rare cases the ethernet led truns amber and link goes down for few seconds.
On observing the 2950 switch, it was found that there is no issue
with the hardware , It is a BPDU problem , where BPDU packets are
being generated by both data centre switch and IBM core switch. Any
one of the BPDU has to be blocked inorder to avoid the link failure.
The following commands were tested in the cisco 2950 switch .
1. Spanning-tree Port fast has been enabled.(for testing purpose)
2. Spanning-tree portfast bpdufilter default.
3. Making fastethernet 0/1 as trunklink.
4. Changing Spanningtree priority value.
5. Enabling Spanningtree gaurd root.
The Ethernet port of 8274 IBM core switch connecting 2950 switch has to be
made as trunk, since it is an uplink to 2950 switch..it is not yet checked as we dont have access to ibm switch.
it is sure that only configuration changes has to be done at 2950 side, since hardware has been replaced last before week and old conf is missing, earlier it was working setup.
i have pasted the error message,configuration details of 2950 switch.
1w3d: %SPANTREE-7-RECV_1Q_NON_TRUNK: Received 802.1Q BPDU on non trunk
1w3d: %SPANTREE-7-BLOCK_PORT_TYPE: Blocking FastEthernet0/1 on VLAN0001.
stent port type.
1w3d: %SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking FastEthernet0/1 on
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.